Step stool



FIG. 1 is a perspective view of a step stool according to the invention.

FIG. 2 is a front view of the step stool according to the invention.

FIG. 3 is a side view of the step stool according to the invention.

FIG. 4 is a rear view of the step stool according to the invention.

FIG. 5 is another side view of the step stool according to the invention.

FIG. 6 is a top view of the step stool according to the invention.

FIG. 7 is a bottom view of the step stool according to the invention; and,

FIG. 8 is a perspective view of the step stool in a folded position according to the invention.

Items shown in broken lines are for illustrative purposes only and form no part of the claimed invention. 

CLAIM We claim the ornamental design for a step stool, as shown and described. 